Lamp-socket.



PATBNTED AUG. 15, 1965.`

W. USCH MAN N LAMP SOCKET. APPLIOATION FILED JUNE 1, 1904.

"lllllllllmllilllll wi/imma@ WILLIAM USCHMANN, OF SCHENECTADY, NEW YORK.

' LAMP-SOCKET.

Specification of Letters Patent.

' Patented Aug. 15, 1905.

Application filed .Tune l, 1904. Serial No. 210,695.

To all whom, it may concern.'

Beit known that I, WILLIAM UsoHMANN, a citizen of the United States, residing at Schenectady, in the county of Schenectady and State of New York, have invented new and useful Improvements in Lamp-Sockets, of which the following is a specification.

My invention relates to new and useful improvements in switches for use in connection with electrical apparatus; and its object is to provide a compact and durable device of this character the parts of which can be readily assembled and which can be used for regulating currents through arc-lamps or for other like purposes and which, if desired, can be connected to the socket of an incandescent lamp.

The invention consists of a rcvoluble tubular head having insulated conducting-strips upon its inner face, which when the head is rotated are adapted to electrically connect spring-contacts which are located within the head and are electrically connected to the terminals of the two wires of a circuit.

The invention also consists in the further novel construction and combination of parts hereinafter more fully described and claimed, and illustrated in the accompanying drawings, showing the preferred form of my invention, and in which- Figure 1 is a section through the socket of an incandescent lamp and through my improved switch which is connected thereto, the lamp being shown in elevation; and Fig. 2 is a section on line 2 2, Fig. l.

Referring to the figures by numerals of reference, 1 is an incandescent lamp having a screw-threaded head 2 of ordinary construction, in the center of the end of which is located a contact 3. This head is adapted to project into and engage a lamp -socket 4, formed of insulating material and having a lining 5, formed of conducting material, said lining being provided with an opening 6 at the center of its inner end. Extending through the opening 6 and through the adjoining portion of the socket 4 is a bolt 7, the head 8 of which bearson the contact 3. A binding-post 9 is connected to the other end of the bolt 7 and has one wire 10 of a circuit secured to it.

Mounted on the bolt 7 adjacent its inner end is a disk 11 of insulating material, which is adapted to bear on the end of socket 4. This disk is of less diameter than the socket and forms a bearing for a core 12, which is mounted on bolt 7 and bears at its other end on a disk 13. The two disks 11 and 13 are secured upon the ends of the core 12 by the binding-post 9, which engages one end of bolt 7 and serves as a nut, and the bolt 7 also serves as a means for securing the two disks and the core to the socket. A conducting-strip 14 is secured to core 12 adjacent one end thereof and projects through the disk 11 and end socket 4, and one end. of this strip bears on the lining 5 of the socket. Another conducting-strip 15 is secured to core 12 adjacent its other end and projects through disk 13, and the two strips are preferably in alinement with each other. Strip 15 serves as a binding-post, to which a second wire 16 of a circuit is adapted to be connected. Each strip 14 and 15 has a recess 17 in its innerface adapted to receive one end of a spring-com 4disk 13 overlaps the end of the head, so as to prevent longitudinal movement thereof. The head 2O is formed of insulating material having grooves 21 at desired intervals in the inner face thereof, and in each of these grooves is located a strip 22 of conducting material. These strips are parallel and each strip is adapted to bear on the two contacts 18 simultaneously. Acap 23 extends over disk 13, binding-post 9, and strip 15 and is secured to one end of head 20. This cap has an aperture 24 at the center thereof, through which lthe wires 10 and 16 are adapted to extend.

When it is desired to direct a current of electricity into the lamp 1, head 20 is rotated by hand until one of the strips 22 is brought into position upon the two contacts 1S. A circuit is thus established from wire 10 through bolt 7 to contact 3 and through the lamp back to lining 5, strip 14, contacts 18, and the strip 22, on which they bear, and then through strip 15 to wire 16. A light can be promptly eX- tinguished by further rotating head 2O until the two contacts 18 arrive in position between two ofthe strips 22 and upon the insulation of which the head is principally formed.

While I have shown this device connected to an incandescent lamp, it will be understood that the same may be used equally as well upon any circuit, whether or not said cir- 2 ver/,otro

cuit includes illuminating devices. The switch not limit myself thereto, as I am aware that modifications may be made therein without departing from the spirit or sacrificing any of the advantages thereof, and I therefore reserve the right to make such changes as fairly fall within the scope of my invention.

Having thus fully described the invention, y

what is claimed as new is-e 1. In a device of the character described, a.

core, disks carried by said core, a contact carried by said core, a head revolubly mounted upon the disks, and a contact carried by said head.

2. In a device of the character described, the combination with a core, disks mounted on the ends of said core, a bolt passing through said core and serving asa contactand adapted to secure the disks in applied position, acontact carried by said core, a head revolubly mounted upon the disks, and a contact carried by said head.

3. In a device of the character described, the combination with a core, and disks at the ends of the core; of insulated conductingstrips upon the core and extending through the disks, contacts projecting from the strips and secured in position thereby, said contacts being normally insulated, and a head revo-V lubly mounted upon the disks and inclosing the core and contacts, said head having alternating faces of conducting and non-conducting material adapted to contact with the contacts. Y 1

` 4f. In a device of the character described, the combination with a core having disks secured to the ends thereof; of insulated conducting-strips connected to the core and extending through the disks, said strips beingI adapted to be connected to the terminals of wires of a circuit,springcontacts secured upon the core by the strips and normally insulated, a head revolubly mounted upon the disks and inclosing the core and contacts, and strips embedded within-the inner surface of the head, whereby insulating' and conducting faces may be alternately moved upon the contacts simultaneously.

5. In a device of the character described, the combination with a core having disks at the ends thereof, and a securing device extending through the disks and core; of insulated conducting-strips secured to the core and extending through the disks, each of said Ystrips having a recess in one face, spring-contacts seated within the recesses and secured upon the core by the strips, said contacts being normally insulated a head revolubly mounted upon the disks and inclosing the core and contacts, and strips embedded in one face of the head, whereby alternatingfaces of conducting and non-conducting material are proy duced, and each ofwhich is adapted to simultaneously bear upon the contacts. I

6. In a device of the character described, the combination with a core having disks at the end thereof, a socket contacting with one of the disks, and an insulated securing device extending through the disks, core and socket and forming a conductor; of a lining within the socket formed of conducting material, insulated conducting-strips secured upon the core and extending through the disks, one of said strips contacting with the lining, contacts extending from said strips, and a head revolubly7 mounted upon the disks and inclosing the core and contacts, said head having alternating faces of conducting and non-conducting material.

7 In a device of the character described, the combination with a core having disks at the ends thereof, and a socket bearing upon one of the disks; of an insulated securing device connecting the socket, disks and core, and adapted to be secured to one terminal of a circuit, a lining of conducting material within the socket, conducting-strips secured to the core and extendingthrough the disks, one of said strips contacting'with the lining, springcontacts secured to the core by the strips and normally insulated, a tubular head revolubly mounted upon the disks and having alternating faces of conducting and non-conducting material adapted to bear on the contacts, and

la cap connected to the head and extending over one of the disks.

8. In a device of the character described, a lamp-socket, a core, disks, a head revolubly mounted on said disks, a bolt passing through the core and serving as al contact and adapted to secure the core-disks and head in applied position, a contact carried by the core, and a contact carried by the head.

In testimony whereof I aflix my signature in presence of two witnesses.

WILLIAM USCHMANN.

Witnesses:

ALEX. FENWICK, Y CHARLES N. VAN DENBERGE. 

